He made a dispatch for a specific purpose.

A．come up
B．occur
C．be found
D．arise

A．Because he sought to become the only composer of his time to challenge accepted musical conventions
B．Because he adopted a new principle of organization in his work by utilizing innovative strategies
C．Because he creatively manipulated the accepted rules and forms governing musical composition
D．Because he synthesized a transition between the older stylistic convention and the newer musical form